117 lines
2.6 KiB
Go
117 lines
2.6 KiB
Go
package utils
|
||
|
||
import (
|
||
"crypto/md5" // #nosec
|
||
"encoding/hex"
|
||
"io"
|
||
"log"
|
||
"math/rand"
|
||
"os"
|
||
"path/filepath"
|
||
"regexp"
|
||
"strings"
|
||
"time"
|
||
"unsafe"
|
||
|
||
jsoniter "github.com/json-iterator/go"
|
||
)
|
||
|
||
var Json = jsoniter.ConfigCompatibleWithStandardLibrary
|
||
|
||
const letterBytes = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"
|
||
const (
|
||
letterIdxBits = 6 // 6 bits to represent a letter index
|
||
letterIdxMask = 1<<letterIdxBits - 1 // All 1-bits, as many as letterIdxBits
|
||
letterIdxMax = 63 / letterIdxBits // # of letter indices fitting in 63 bits
|
||
)
|
||
|
||
func RandStringBytesMaskImprSrcUnsafe(n int) string {
|
||
var src = rand.NewSource(time.Now().UnixNano())
|
||
b := make([]byte, n)
|
||
|
||
// A src.Int63() generates 63 random bits, enough for letterIdxMax characters!
|
||
for i, cache, remain := n-1, src.Int63(), letterIdxMax; i >= 0; {
|
||
if remain == 0 {
|
||
cache, remain = src.Int63(), letterIdxMax
|
||
}
|
||
if idx := int(cache & letterIdxMask); idx < len(letterBytes) {
|
||
b[i] = letterBytes[idx]
|
||
i--
|
||
}
|
||
cache >>= letterIdxBits
|
||
remain--
|
||
}
|
||
|
||
return *(*string)(unsafe.Pointer(&b)) //#nosec
|
||
}
|
||
|
||
func MD5(plantext string) string {
|
||
hash := md5.New() // #nosec
|
||
hash.Write([]byte(plantext))
|
||
return hex.EncodeToString(hash.Sum(nil))
|
||
}
|
||
|
||
func IsWindows() bool {
|
||
return os.PathSeparator == '\\' && os.PathListSeparator == ';'
|
||
}
|
||
|
||
var ipv4Re = regexp.MustCompile(`(\d*\.).*(\.\d*)`)
|
||
|
||
func ipv4Desensitize(ipv4Addr string) string {
|
||
return ipv4Re.ReplaceAllString(ipv4Addr, "$1****$2")
|
||
}
|
||
|
||
var ipv6Re = regexp.MustCompile(`(\w*:\w*:).*(:\w*:\w*)`)
|
||
|
||
func ipv6Desensitize(ipv6Addr string) string {
|
||
return ipv6Re.ReplaceAllString(ipv6Addr, "$1****$2")
|
||
}
|
||
|
||
func IPDesensitize(ipAddr string) string {
|
||
ipAddr = ipv4Desensitize(ipAddr)
|
||
ipAddr = ipv6Desensitize(ipAddr)
|
||
return ipAddr
|
||
}
|
||
|
||
// SplitIPAddr 传入/分割的v4v6混合地址，返回v4和v6地址与有效地址
|
||
func SplitIPAddr(v4v6Bundle string) (string, string, string) {
|
||
ipList := strings.Split(v4v6Bundle, "/")
|
||
ipv4 := ""
|
||
ipv6 := ""
|
||
validIP := ""
|
||
if len(ipList) > 1 {
|
||
// 双栈
|
||
ipv4 = ipList[0]
|
||
ipv6 = ipList[1]
|
||
validIP = ipv4
|
||
} else if len(ipList) == 1 {
|
||
// 仅ipv4|ipv6
|
||
if strings.Contains(ipList[0], ":") {
|
||
ipv6 = ipList[0]
|
||
validIP = ipv6
|
||
} else {
|
||
ipv4 = ipList[0]
|
||
validIP = ipv4
|
||
}
|
||
}
|
||
return ipv4, ipv6, validIP
|
||
}
|
||
|
||
func IsDirEmpty(name string) (bool, error) {
|
||
f, err := os.Open(filepath.Join("./", filepath.Clean(name)))
|
||
if err != nil {
|
||
return false, err
|
||
}
|
||
defer func() {
|
||
if err := f.Close(); err != nil {
|
||
log.Printf("Error closing file: %s\n", err)
|
||
}
|
||
}()
|
||
|
||
_, err = f.Readdirnames(1)
|
||
if err == io.EOF {
|
||
return true, nil
|
||
}
|
||
return false, err
|
||
}
|